public void LibraryTracks()
        {
            Controller      controller = new Controller();
            TrackCollection tracks     = controller.LibraryPlaylist.Tracks;

            PersistentIDCollection pids = new PersistentIDCollection();

            //List<int> tids = new List<int>();

            watch.Start();

            foreach (Track track in tracks.Values)
            {
                if (track != null)
                {
                    pids.Add(track.PersistentID);
                    //tids.Add(track.trackID);
                    track.Dispose();
                }
            }

            watch.Stop();
            Console.WriteLine(String.Format("Found {0} tracks", pids.Count));
            Console.WriteLine(String.Format("Completed in {0} ms", watch.GetElapsedMilliseconds()));

            tracks.Dispose();
            tracks = null;

            controller.Dispose();
            controller = null;
        }